Table driving and feeding mechanism for grinding-machines.



A. M'. DHAKE. l TABLE DRIVING AND FEEDING MECHA'NISM FOR GHINDING NAGHKINES.`

APPLICATION FILED, SEPT26| I9|6 w Pmented A111217, 1917.

2 SHEETS-mien A. M. BRAKE'.

TABLEDRIVING AND FEEDING MECHANISM'FOR GRINDING II'ACHINES.

4 APPLICATION FILED SEPI-.26|1-9I6l I I I 1 ,223 ,155. Pmented Apr. 17,1917.

2 SHEETS-SHEET 2.

WWW

, UNITED STATES PATENT oEEIeE.

ALDnN n. Diam, orwoncnsrnn, MASSACHUSETTS, assrc Non To REALI) nAcnnm COMPANY, or' woncEsTEn., MASSACHUSETTS, A conronAToN or' MASSACHUSETTS TABLE DRIVING AND FEEDING MECHANISM FOR GB. MUG-MACHINES.

Specicatcn of Letters Patent.

l.aten ted Apr. 1 7, 1917.

Anneau@ nea september amena.V sernmazaasos.' y

To all whom# may concern:

Be. it known that I Amun M. DRAKE, a citizen of the United States, residing at Worcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Table Driving and Feeding Mechanism for Grindin -Machines, of which the following is a cation.

This invention relates to a table driving and feeding mechanism for grinding ma chines of the 4type in which the work table is rotatable about a substantially vertical axis.

It is the object of my inventionto im- .prove the construction of such mechanism making it more simple to manufacture, more reliable in operation, and more convenient in manipulation. j

In the preferred form of my invention, the table-supporting spindle is adjustable longitudinally and also eafigrflarlyy about a horizontal One feature f my invention relates to the provision of improved devices for rotating the spindle in every position thereof, without interfering with the axial and angular adjustmentV thereof. The mechanism herein shown is so designed that result is attained by a gear drive 'and'without' theuse of swivel or sliding connections.

A further feature relates to the provision of an improved spindle adjustment which may be o either manually or4 auto-" matically by the 'use of which p accuracy of justment may be secu 4My invention 4:further relates to certain ary n ents and combinations of artsfwhieh be hereinafter described an more particularly set forth in the appended claims. v

A preferred form, of my linvention is. shownin the drawings in which p p' `Figure 1 is a side elevation partl -in section of a portion of a.y embodying my invention;

. 2isavertical sectional view taken in a plane at right angles-tothe, plane of elong'theline--nFi2i .,Bis a horizontal sectional view taken 4 is a pari ial horizontal sectional' view taken aong the line 4-4= in Fi 2, and

Fig. 5 is. a detail setiona view taken along .the line 5- -5 in Fig. 4.

Referring to he drawings, I have shown a frame '1G supp )rting a wheel slide 11 upon 55 which the grinding wheel W is rotatably mounted. Suitable mechanism, Anot shown, is provided for reciprocating the wheel slide beth manually a: 1d automatically. The work 1s Supported up n .a rotatable table which is Shown herein as l a vmagnetic chuck V12 mounted upon he upper end of a spindle 13 rotatable in learin in a sleeve 14. The sleeve 14 is sli able ut nonerotatable in a support 15 whichis mounted for angular adjustment about the axis Vof a horizontal shaft 16 (Fi 3). vThe chuck 12 may be provided wi 1. casing 17 extending downward between tie flanges 18 and 19 formed on a member 20 securedtothe upper end of "io the support l', This casing protects the inside of the ein.' :i: from water andr cutting compounds.

Rotation of the sleeve 14 is prevented by 'the provision e? a key 21 (Fig. 2 slidable in a key-way ir the support 15. vhe lower' portion of the sleeve 14 is externally ireaded, and extends through a nut 22 which is positie ned a pocket or recess 23 in the' suppcrt 15, and is supported by ay of balls 24 resting upon a `thrust plate 25. -The outer portionof the nut"22 is provided with gear teeth meshing with a pinion 26 secun :d t0 the lower end of a short. Substantiallyvartical shaft 27 rotatable in bearings in the support 15, andha a'` bevel gear. 28 -iixed to its upper end. e gear 28meshef with a corresponding bevel 29 mounted on the end o a horlzontal i aft 30 to whi ch is secured a ratchet wheel 90 31 'and handl wheel; 32. A pawl 33 is mounted on an arm 34 adapted to. about the axisnf the shaft 30,and conn b'yalink35 to'any suitable source (af-plo;

The pawl 33 el and thus through w table 12l may be shaft 16 is rotatable in sleeves 46-46 which are threaded into projections 15 extending rearwardly from the support 15. sleeves 46 are pivoted in bearings 47-47 formed on the frame 10, and thus permit angular adjustment of the support 15.

A bevel gear 48 is secured to the end of the shaft 16', and meshes with a bevel ear 49 (Fig. 1) mounted on a horizontal s aft 50 rotatable in a bearing 51, and driven from any suitable source of 1power through connections, not shown. riving engagement is thus provided between the shaft 50 and the spindle 13 in every vertical or angular position of the spindle, and this driving connection is a ositive gear drive free from\ swivel joints an sliding connections of any sort.

For the adjustment of the sup ort 15 about the axis of the shaft 16 I provi e the adjust'- ing screw 52 (Fig. 4) rotatably mounted in the ,support 15, and provided'with a fiange 53 which prevents axial movement of the screw in the support. The screw is provided with a hand wheel 54 by which it may be adjusted and its threaded rear portion extends throu h a threaded'hole in a plug 55 which is sli able axially in a hole 56 extending transversely of a swivel head 57 pivotally supported in a bearing 58 on the frame 1G.

- By turning the hand wheel 54 the support may he moved in or out with relation to the swivel head y5'? and frame 10, the swivel head and the sliding plug providing for the resulting displacement of the screw 52. The support 15 1s provided with a rearward projectlon 59 through which extends a clamping boltv 60. This bolt also extends throng? slots, not shown, in the frame 10, and ,a ords means for rigidly securing the 'support inl any adjusted positlon. v

A sleeve or casing 61 may be secured to the lower end ofthe support 15 to cover the threaded rtion of the sleeve 14, and also thegear 1', while the sleeve is in its lowest positlon.

YHaving thus described my invention it .'will be evident that chan tions can-be made therein y those skilled in j the art without departingffrom the spirit and4 scope of my invention as set forth in the claims, and I'do not wish to be otherwise -TheI and modiiicalimited to the details herein shown, but what I claim is 1. In a grinding machine in combination, a work table a splndle on wh mounted, a sleeve forming a bearing for said spindle, a pivotally mounted support for said sleeve, means to adjust said support angularly and to secure said support in adjusted position, and means to adjust said sleeve axially in said support.

2. In a indin machine, in combination,

a work tab e, a su stantially vertical spindle on which said table is mounted, a sleeve forming a bearing for said s indle, a hinged support for said sleeve angu arly a 'ustable in a vertical plane, a horizontal sha t about the axis of which said support is angularly adjustable, means to drive said shaft, an in termediate shaft parallel to said s indle, bevel gear connections between s ai horizontal and said intermediate shafts and gear connections between said intermediate shaft and said spindle.

3. In a grinding a work table, a su on which said table is |mounted, a sleeve forming a bearing for said spindle and having a ortion of its cylindrical outer surface threa ed, a su port forsaid sleeve, a nut rotatable in a earing on said support but confined against axial movement, and means to turn said nut, saiduneans comprising gear 'teeth onl said nut, aI pinion meshing therewith, and positively actuated means for rotating said pinion by; power. 4. In a grindin machine, in combination, a work table, a su antially vertical spindle on which said table is mounted a sleeve forming a bearin for said spindle and havin a portion o its cylindrical outer surface t readed, a support for said sleeve, a nut for said sleeve rotatable in a be on said support but confined. against ax'ia movement, agear secured to said nut, a mion meshing with said gear, a short shaft or said pinion parallel to said spindle and a short horizontal shaft, both shafts being rotatable in bearings in said suptport, driving connections between said sha s, an-auto matic pawl and ratchet feed 'for saidv horimachine, in combination,

zontal shaft, and additional means forturn ich said table is' rect gear drive from said` 'inding machine, "in combination,

stantially vertical spindle 1,22a,155 Y E port, said means comprising a screw rotataing a ortion of it; cylindrical outer surface ble in said support but confined from axial thre ed, a su port for said sleeve, a. nut movement, a swivel head mounted in the rotatable in a ea ringon said support but frame of the machine, and aplug slidable coniined against axial movement, a gear and A transversely in said head and threaded to repinion drive for said nut, power drlven de- 15 ceive said screw. vices for moving.; aid pinion and additional 7. Ina grindin machine, -in combination, means to move saul pinion manually.' a work table, a su stantially vertical spindle In testimony whereof I have hereunto on which said table is mounted, a sleeve affixed my signature. t

l ALBEN M. DRAKE.

10 forming a bearing for said spindle and hav- 

